制造大型高低压复合转子的技术难点是：选择最佳的化学成分精炼、合理的锻造工艺和采用特殊的热处理方法。
The technical keys of manufacturing large high - low pressure combined rotors are selecting optimum chemical compositions, refining , forging and special heat treatment.
制造大型高低压复合转子的技术难点是：选择最佳的化学成分精炼、合理的锻造工艺和采用特殊的热处理方法。
The technical keys of manufacturing large high - low pressure combined rotors are selecting optimum chemical compositions, refining , forging and special heat treatment.
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